4F水溶液中的陽(yáng)極氧化為例，計(jì)算了電極電位，解釋了在低電壓下多孔陽(yáng)極氧化物的形貌。結(jié)果表明，多孔陽(yáng)極氧化物的生長(zhǎng)由離子電流和電子電流的比值決定。陽(yáng)極氧化過(guò)程中的金屬分為2類(lèi)：一類(lèi)是容易形成致密氧化層的金屬，另一類(lèi)是容易導(dǎo)致氧氣析出的金屬。相應(yīng)的，電解液也被分為2類(lèi)：容易形成致密氧化層的電解液和容易導(dǎo)致氧氣析出的電解液。"/>

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電極電位解釋陽(yáng)極氧化物的生長(zhǎng)
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作者單位:

1.南京理工大學(xué) 軟化學(xué)與功能材料教育部重點(diǎn)實(shí)驗(yàn)室，江蘇 南京 210094;2.江蘇城鄉(xiāng)建設(shè)職業(yè)學(xué)院，江蘇 常州 213147

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基金項(xiàng)目:

The National Natural Science Foundation of China (Grant Nos. 51577093, 51777097), the Natural Science Foundation of Jiangsu Higher Education Institutions (20KJB430040), Changzhou Science & Technology Program (CJ20200026) and the Qing Lan Project in Colleges and Universities of Jiangsu Province.


Electrode Potential Explaining the Growth of Anodic Oxides
Author:
Affiliation:

1.Key Laboratory of Soft Chemistry and Functional Materials of Ministry of Education, Nanjing University of Science and Technology, Nanjing 210094, China;2.Jiangsu Urban and Rural Construction College, Changzhou 213147, China

Fund Project:

National Natural Science Foundation of China (51577093, 51777097); Natural Science Foundation of Jiangsu Higher Education Institutions (20KJB430040); Changzhou Science & Technology Program (CJ20200026); Qing Lan Project in Colleges and Universities of Jiangsu Province

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    摘要:

    多孔陽(yáng)極氧化物的形成機(jī)理至今仍不清楚。研究者傾向于用物理模型來(lái)解釋它們的生長(zhǎng)機(jī)理，很少報(bào)道電極電位對(duì)陽(yáng)極氧化的影響，因?yàn)殛?yáng)極氧化電壓遠(yuǎn)遠(yuǎn)高于電極電位。創(chuàng)新性地引入電極電位理論、氧氣氣泡模型以及離子電流和電子電流理論來(lái)解釋3種金屬（Ti、Zr和Fe）在低電壓下多孔陽(yáng)極氧化物的生長(zhǎng)機(jī)理。以Ti在0.5%（質(zhì)量分?jǐn)?shù)）NH4F水溶液中的陽(yáng)極氧化為例，計(jì)算了電極電位，解釋了在低電壓下多孔陽(yáng)極氧化物的形貌。結(jié)果表明，多孔陽(yáng)極氧化物的生長(zhǎng)由離子電流和電子電流的比值決定。陽(yáng)極氧化過(guò)程中的金屬分為2類(lèi)：一類(lèi)是容易形成致密氧化層的金屬，另一類(lèi)是容易導(dǎo)致氧氣析出的金屬。相應(yīng)的，電解液也被分為2類(lèi)：容易形成致密氧化層的電解液和容易導(dǎo)致氧氣析出的電解液。

    Abstract:

    The formation mechanism of porous anodic oxides remains unclear till now. The classical field-assisted dissolution (FAD) theory cannot explain the relationship between the current curve and FAD reaction, and the influence of the electrode potential on anodization is rarely reported. The electrode potential theory, oxygen bubble model and the ionic current and electronic current theories were introduced to explain the growth of porous anodic oxides of three metals (Ti, Zr and Fe). Taking the anodization of Ti in aqueous solution containing 0.5wt% NH4F as an example, the electrode potential was calculated, and the morphology of porous anodic oxides was investigated at low voltages. Results show that the growth of porous anodic oxides is determined by the ratio of the ionic current to the electronic current. During the anodization, metals are classified into two groups: one is easy to form the compact oxide layer, and the other is easy to induce oxygen releasing, thus forming oxygen bubbles. The electrolyte is also classified into two groups correspondingly: compact oxide layer-assisted electrolyte and releasing oxygen-assisted electrolyte.

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蔣龍飛,龔天樂(lè),李鵬澤,張少瑜,陳濱掖,朱云暄,王冰,朱緒飛.電極電位解釋陽(yáng)極氧化物的生長(zhǎng)[J].稀有金屬材料與工程,2024,53(9):2485~2492.[Jiang Longfei, Gong Tianle, Li Pengze, Zhang Shaoyu, Chen Binye, Zhu Yunxuan, Wang Bing, Zhu Xufei. Electrode Potential Explaining the Growth of Anodic Oxides[J]. Rare Metal Materials and Engineering,2024,53(9):2485~2492.]
DOI：10.12442/j. issn.1002-185X.20230843

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  • 收稿日期:2023-12-27
  • 最后修改日期:2024-03-22
  • 錄用日期:2024-03-26
  • 在線發(fā)布日期: 2024-09-12
  • 出版日期: 2024-09-04